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Solution


Q.

Given below are two statements:                 [2025]

Statement (I): The boiling points of alcohols and phenols increase with increase in the number of C-atoms.

Statement (II): The boiling points of alcohols and phenols are higher in comparison to other class of compounds such as ethers, haloalkanes.

In the light of the above statements, choose the correct answer from the options given below:
1 Statement I is false but Statement II is true  
2 Statement I is true but Statement II is false  
3 Both Statement I and Statement II are true  
4 Both Statement I and Statement II are false  

Ans.

(3)

With increase in number of carbon atoms, magnitude of London forces of attraction increases hence boiling point increases. Alcohols and phenols have intermolecular hydrogen bonding hence boiling point of alcohols and phenols are higher than ethers or haloalkanes with comparable molar masses.